I don't know whether I should keep trying.
 No biggie, lights right up. Went through a couple LEDS somehow...had them lightin' there for bout a minute.
 Maybe if this schem get verified I'll go through with the DMM and find the problem, or whip up another...hard to say though...maybe both timers got tried with the other connection did something to them they;ve never been known to like?
 Perhaps you could check it again again for me? also I'm connecting the flat ridge of the LED to the ground point....[].

This is actually similiar to one of the designs I had for the trem/ring mod I'm working on, but I ditched the 555 and the LDR for an LFO and a .  Interesting how you implemented the swell, though...

-Colin

It would be too cool if I could figure to get it working.
 Anyone had success? I'm waitin' till some feedback comes before I continue////

Quote from: petemooreI don't know whether I should keep trying.
 No biggie, lights right up. Went through a couple LEDS somehow...had them lightin' there for bout a minute.

The only way to destroy a led, is to leave out the series resistor. Can a 555 timer output supply enough current to fry a led without a current limiting resistor? i think so..!
As for how many leds you can run from a 555, certainly more than one.
Either in series, or paralleled with individual protection resistors.

ok petemoore pin three is the output that drives the led.. you should probally use a limiting resistor i forgot to include this as i had one prewired up inline in heatshrink so i kinda forgot about that..  

verry cool idea of having two of them.  i didnt' think about that.

thanks collin, i appreciate that. i basically modde one of my old audio to do a trem type thing.   its kind of a low fi thang.. lol

again with the led, you are right on the money there paul i forgot to add that in the schematic. other than that it is correct on the schematic.  by the way i used a 1k for my resistor

Thanks ! I should be able to get it going then...I'll redouble check I got everything wired right with the DMM and stick another timer in there.

yeah sorry about that petemoore.  i didnt' realize i had left that out.

Quote from: smoguzbenjaminHmmm. I ripped a 555 of a LED chaser yesterday. Now to get my hands on an LDR

do you need an ldr, i got a couple of extras from ratshack

i am getting a few boards madeup for the tremelo, anyone want one. you can have it for cost..  basically to cover my shipping and cost on the boards and to ship it to you is about 2 dollars each. if i order 10 which is what i planned on doing.

drop me an email and let me know if you want one.. or reply here and i will get the ball rolling if i can get atleast five people interested

Quote from: Paul Perry (Frostwave)For anyone who is completely crazy, you could make a second 555 section (hell, that will cost almost a dollar!) and have TWO leds both shining on the LDR, then you can get some complex rhythms going!

Well, don'tcha think three would be even better... or, hey... isn't there a quad version of the 555?

How about two tremolos, a disto, and... um... an optical wah like the soul kiss, or something? All in the same box with switching to sync some of them, all of them, or none of them! :shock:  

~ Charlie

hey why not while we are at it lets replace the led with a little glass bulb and that way we can have a little delay in the cutoffs or perhaps a christmas tree light i will have to try this tonight.   what about using a a cmos 4049 so we could have an overdrive a feedbacker a compressor a auto wah and expandor.  what else could we do.

Here is another idea: use two circuits and two LDRs, in paralled but with one output for each LDR. Use a dual pot for the speed pot, to control both speeds at the same time, but put a resistor in one to get a difference in tremolo time. With the right resistor value, you will get a stereo panner.

...then run fiber optics from the 4 LEDS (have to be different colors) up to the cover of the box...

Quote from: Hal...then run fiber optics from the 4 LEDS (have to be different colors) up to the cover of the box...

actually i have a fiber optic circuit..

finally got mine working last night!

pretty much, my problem was the cap connected to pin 3...I didn't read Ansil's followup until last night.

Now I'm using a 47 uF cap, and 10k resistors for both R1 and R2.  This gives the LED an off time of about (exactly?) half the on-time.  I'm using the little silver radioshack LDR, the smallest of the ones that come in the variety pack.  It has dark resistance of about 50-100k, but i need new batteries for my meter.  

I'm using a green rectangular diffused LED, that i ripped out of a floppy drive at some point.  I tried it on a breadboard, at night.  So it was dark, but not pitch black.  No paralell resistor, but with about 3" between the LED and LDR.

NPN boost before.

it soudned pretty sick.  Didn't quite fade all the way, which is awesome.  Good sweep, and good speed, even though its hardwired.  THe best part was the swell, though.  I was able to play on the beat as the LED was turning on, and got a really really cool swell effect.  

Thanks to all that helped.   Now I'm just depating on wheterh or not to perfboard this one.  Only problem is a very slight, but audible click as the LED turns on and off.

Ok, now for the newbie questions...

You show a "gain stage" before the curcuit... Is this basically any boost curcuit?  I am sure the conversation about the best ones are in another thread somewhere.  Would you have an additional volume pot then?   Can I connect the + side of the battery to both curcuits or do I need 2 batteries?

Thanks for putting up with beginners

yes, yes, yes, and yes :-D

no, you wouldn't _have_ to have a volume pot, but you could.  I would suggest a gain of about 2, if not.  Depending on the LDR, more or less gain might sound better - more intense effect.  And yes, you can use the same battery...unless this is the reason i'm getting clicks on the output....

I'm sure it's in there but...
 What we're talking about is putting the LDR Inline with ckt signal output?
 The only thing I could see schematic wise is on the remote control page where it uses two LDR's like a volume pot the leads of the LDR's tied together and forming the 'wiper'...with many added pots and suches as that...
  Could someone explain for Dummy [me] exactly how the LDR are wired to get tremolo?
  I tried one yesday...two LDR's with 100k's on them, each LDR/R pair having one leg tied to the other forming the wiper of the 'volume pot'...the other 'lugs' [leads of the LDR/Rvol ckt] connected like lugs 1&3 of the pot it replaced.
  I cut the 'top' [signal side] 100k resistor off of the LDR, and was getting a usable boost function by covering that LDR...the 'bottom' [to ground] LDR didn't seem to do much of anything....it didn't go all the way down, but would be useful as a trem. [I don't use that much full depth tremolo anyway]...it was put after a Blackfire stage...
  Ok so...I've typed what I can about what I think I know...am I missing something?
  Thanks for all the fun!!! Makes a great 'person attracter'...just put it in a transluscent white plastic bag and set it out in a dark place...ppl just can't resist the [green LED] blinking bag...fun party trick when you're expecting guests...lol

yep thats why i was using a gainstage before it.. :lol:  :lol:  :lol:

i acutally have something prety close to that on a piece of paper some where, only i never really filled in any values, just the basic drawing... i've been meaning to order some 555's